- Breast Subtype (2010+) - created by combining HER2, ER, and PR fields.
- Derived HER2 Recode (2010+) - a HER2 summary field derived for unknown values in CS SSF 15.
- Site Specific Data Item Recodes - documentation for available SSDI variable recodes.
An official website of the United States government
Government Funding Lapse
Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted. The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit  cc.nih.gov. Updates regarding government operating status and resumption of normal operations can be found at OPM.gov.
